Recognize DDR4 memory as such, and print manufacturer information.
---
eeprom/decode-dimms | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 61 insertions(+), 1 deletion(-)
--- i2c-tools.orig/eeprom/decode-dimms 2017-11-17 11:21:42.644379702 +0100
+++ i2c-tools/eeprom/decode-dimms 2017-11-17 11:21:44.196398606 +0100
@@ -1702,6 +1702,17 @@ sub decode_ddr3_sdram($)
}
+# Parameter: EEPROM bytes 0-127 (using 1-1)
+sub decode_ddr4_sdram($)
+{
+ my $bytes = shift;
+
+# SPD revision
+ printl_cond($bytes->[1] != 0xff, "SPD Revision",
+ ($bytes->[1] >> 4) . "." . ($bytes->[1] & 0xf));
+
+}
+
# Parameter: EEPROM bytes 0-127 (using 4-5)
sub decode_direct_rambus($)
{
@@ -1747,6 +1758,10 @@ sub decode_rambus($)
"DDR SDRAM" => \&decode_ddr_sdram,
"DDR2 SDRAM" => \&decode_ddr2_sdram,
"DDR3 SDRAM" => \&decode_ddr3_sdram,
+ "DDR4 SDRAM" => \&decode_ddr4_sdram,
+ "DDR4E SDRAM" => \&decode_ddr4_sdram,
+ "LPDDR4 SDRAM" => \&decode_ddr4_sdram,
+ "LPDDR4X SDRAM" => \&decode_ddr4_sdram,
"Direct Rambus" => \&decode_direct_rambus,
"Rambus" => \&decode_rambus,
);
@@ -1819,6 +1834,35 @@ sub decode_ddr3_mfg_data($)
sprintf("0x%02X%02X", $bytes->[146], $bytes->[147]));
}
+# Parameter: EEPROM bytes 0-383 (using 320-351)
+sub decode_ddr4_mfg_data($)
+{
+ my $bytes = shift;
+
+ prints("Manufacturer Data");
+
+ printl("Module Manufacturer",
+ manufacturer_ddr3($bytes->[320], $bytes->[321]));
+
+ printl_cond(spd_written(@{$bytes}[350..351]),
+ "DRAM Manufacturer",
+ manufacturer_ddr3($bytes->[350], $bytes->[351]));
+
+ printl_mfg_location_code($bytes->[322]);
+
+ printl_cond(spd_written(@{$bytes}[323..324]),
+ "Manufacturing Date",
+ manufacture_date($bytes->[323], $bytes->[324]));
+
+ printl_mfg_assembly_serial(@{$bytes}[325..328]);
+
+ printl("Part Number", part_number(@{$bytes}[329..348]));
+
+ printl_cond(spd_written(@{$bytes}[349]),
+ "Revision Code",
+ sprintf("0x%02X", $bytes->[349]));
+}
+
# Parameter: EEPROM bytes 0-127 (using 64-98)
sub decode_manufacturing_information($)
{
@@ -1941,8 +1985,14 @@ sub read_hexdump($)
sub spd_sizes($)
{
my $bytes = shift;
+ my $type = $bytes->[2];
- if ($bytes->[2] >= 9) {
+ if ($type == 12 || $type == 14 || $type == 16 || $type == 17) {
+ # DDR4
+ my $spd_len = 256 * (($bytes->[0] >> 4) & 7);
+ my $used = 128 * ($bytes->[0] & 15);
+ return ($spd_len, $used);
+ } elsif ($type >= 9) {
# For FB-DIMM and newer, decode number of bytes written
my $spd_len = ($bytes->[0] >> 4) & 7;
my $size = 64 << ($bytes->[0] & 15);
@@ -2285,6 +2335,9 @@ for $current (0 .. $#dimm) {
"DDR SGRAM", "DDR SDRAM", # 6, 7
"DDR2 SDRAM", "FB-DIMM", # 8, 9
"FB-DIMM Probe", "DDR3 SDRAM", # 10, 11
+ "DDR4 SDRAM", "Reserved", # 12, 13
+ "DDR4E SDRAM", "LPDDR3 SDRAM", # 14, 15
+ "LPDDR4 SDRAM", "LPDDR4X SDRAM", # 16, 17
);
if ($bytes[2] < @type_list) {
$type = $type_list[$bytes[2]];
@@ -2300,6 +2353,13 @@ for $current (0 .. $#dimm) {
# Decode DDR3-specific manufacturing data in bytes
# 117-149
decode_ddr3_mfg_data(\@bytes)
+ } elsif ($type eq "DDR4 SDRAM" ||
+ $type eq "DDR4E SDRAM" ||
+ $type eq "LPDDR4 SDRAM" ||
+ $type eq "LPDDR4X SDRAM") {
+ # Decode DDR4-specific manufacturing data in bytes
+ # 320-383
+ decode_ddr4_mfg_data(\@bytes)
} else {
# Decode next 35 bytes (64-98, common to most
# memory types)
--
Jean Delvare
SUSE L3 Support
